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CVE-2026-104126

6.0 · MEDIUM

JumpServer is an open source bastion host and an operation and maintenance security audit system.

Published Oct 13, 2026CWE-94EPSS 0.38%

Overview

CVE-2026-104126 is a medium-severity vulnerability. It was published on October 13, 2026 and has a CVSS 3.1 base score of 6.0 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.0, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

JumpServer is an open source bastion host and an operation and maintenance security audit system. Prior to 4.10.17-lts, JumpServer's Ansible-based automation rendering can evaluate attacker-controlled template expressions from users who have permission to create or execute affected automation tasks. Crafted content can invoke sensitive Ansible lookup behavior, including file, pipe, env, and password lookups, within the Ansible execution context, which can disclose files or environment values and may permit limited command execution under the privileges of the automation process. The issue does not provide unauthenticated access or direct access to unrelated JumpServer assets. This issue is fixed in version 4.10.17-lts.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/jumpserver/jumpserver/commit/cc57ba0de5f6015746fae11cfc62402b11618e59GitHubgithub.com/jumpserver/jumpserver/pull/16886GitHubgithub.com/jumpserver/jumpserver/releases/tag/v4.10.17GitHubgithub.com/jumpserver/jumpserver/security/advisories/GHSA-gr5x-5c4h-867g

How CyberStrike helps

Frequently asked questions

What is CVE-2026-104126?

CVE-2026-104126 is a medium-severity vulnerability. It was published on October 13, 2026 and has a CVSS 3.1 base score of 6.0 (MEDIUM).

How severe is CVE-2026-104126?

This vulnerability has a CVSS 3.1 base score of 6.0, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-104126?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-104126?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-104126 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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